18450397 has 8 divisors (see below), whose sum is σ = 21576896. Its totient is φ = 15446592.

The previous prime is 18450379. The next prime is 18450427. The reversal of 18450397 is 79305481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18450397 - 2⁷ = 18450269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18451397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30348 + ... + 30949.

It is an arithmetic number, because the mean of its divisors is an integer number (2697112).

Almost surely, 2^18450397 is an apocalyptic number.

It is an amenable number.

18450397 is a deficient number, since it is larger than the sum of its proper divisors (3126499).

18450397 is an equidigital number, since it uses as much as digits as its factorization.

18450397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61347.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 18450397 is about 4295.3925315389. The cubic root of 18450397 is about 264.2420348837.

The spelling of 18450397 in words is "eighteen million, four hundred fifty thousand, three hundred ninety-seven".